I
I Throw Thumbers
- Jan 1, 1970
- 0
Hello s.e.d,
Here's a puzzle I've been thinking about for a few days. I am testing
a bunch of LCD montiors that draw around 19W or 20W of power on a
12Vdc input. One of the tests is a ripple test wherein I supply the
monitor(s) with 12Vdc supply that has an AC ripple on it of 1V peak-to-
peak at a frequency of 1MHz and verify functionality.
The basic question is: how do I do create this kind of supply?
I've been thinking about op-amps, but the ones I had laying around
can't source 1.6ish amps. I've been thinking about amplifying the AC
portion through a simple 4-resistor BJT bias circuit, but the
transistors had too low of a saturation voltage. I've been thinking
that in a few weeks I'll have to do the same thing but for monitors
that draw 30W and even 60W. I've been thinking about equipment that
already exists that will do this, but I don't know it. Shouldn't this
be an easy enough circuit?
-drewbob
Here's a puzzle I've been thinking about for a few days. I am testing
a bunch of LCD montiors that draw around 19W or 20W of power on a
12Vdc input. One of the tests is a ripple test wherein I supply the
monitor(s) with 12Vdc supply that has an AC ripple on it of 1V peak-to-
peak at a frequency of 1MHz and verify functionality.
The basic question is: how do I do create this kind of supply?
I've been thinking about op-amps, but the ones I had laying around
can't source 1.6ish amps. I've been thinking about amplifying the AC
portion through a simple 4-resistor BJT bias circuit, but the
transistors had too low of a saturation voltage. I've been thinking
that in a few weeks I'll have to do the same thing but for monitors
that draw 30W and even 60W. I've been thinking about equipment that
already exists that will do this, but I don't know it. Shouldn't this
be an easy enough circuit?
-drewbob